By 2376, Zimmerman was terminally ill and only expected to live a few more months. In desperation, Reginald Barclay sent a message to USS Voyager to see if the Doctor would be able to cure Zimmerman. Upon learning of Zimmerman's illness, the Doctor had himself transmitted back to the Alpha Quadrant, where he finally met the man who had created him and other Mark Is. After some difficulty, the Doctor was able to treat Zimmerman, who was happy to see that one of the holograms he created was still doing what he had designed it to do. (VOYepisode: "Life Line")